• Two types of input terminals are provided on the rear for input
connections.
(1) 2P terminal (marked HOT, E)
It is provided for direct input (unbalanced, 10k ohms) without
using plug-in modules. This terminal is directly connected with
a potentiometer inside.
(2) Plug-in module input
Select the desired modules according to application.
Plug the module into INPUT PORT, slid-
ing it between the guide rails, and secure
with two screws.
When INPUT PORT is not occupied, cover
the PORT with the blank panel, and
secure it with screws.
Be sure that INPUT-LEVEL SWITCH is in
the proper position for the modules used
or the equipment connected to DIRECT
INPUT TERMINAL.
When the P-924A is used in combination
with a mixer preamplifier or serves as an
incremental power amplifier, normally
place INPUT LEVEL SWITCH in "1V
(0dBv)" position.
Place the LOW-CUT
SWITCH in "CUT" position
When connecting speakers to the 4
25V and 70V via the output
transformer (matching transformer) and direct output of 4
the
connecting method differs in each case. See the following diagrams.
Note: Impedances indicated below imply total speaker system
(load) impedance.
When connecting speakers to any one of the outputs of 8
25V
or 70V (BALANCED TRANSFORMER OUTPUT);
The speaker outputs of the amplifier are 4
8
25V and
70V.
Connect speakers to one of these outputs.
Class 2 wiring may be used.
Since these outputs consist of 8
<P-924A>
output. (UNBLANCED
Signal tone generator module
(with presettable output level control)
B-01
L-01
S-01
S-02
S-03
1kHzSineWave
Yelp and buzzer
One-tone chime and
continuousone-tone
chime
*See PLUG-IN MODULES for detail.
Plug-in Modules
Plug-in Modules and Input Level SW Setting
Model
No.
Input level SW
Setting
1V
(0dBV)
100mV
(—20dBV)
Balanced low impedance microphone preamp. module
(with presettable low-cut filter, high-cut filter and gain
controls)
Unbalanced high impedance microphone preamp module
(with presettable low-cut filter, high-cut filter and gain
controls)
Equalized mag phono preamp module
(with presettable gain control)
Unbalanced high impedance auxiliary preamp. module
(with presettable gain control)
—
RemoteVolume
control
Voice Gate
Compressor
-
-
—
RemoteVolume
control
Compressor
M-61
M-03
R-01
Balanced 10k bridging transformer module
Balanced 600
bridging transformer module
DIRECT OUTPUT);
<P-924A>
Input Connections
Output Connections P-924A
Note:
In this case, the LOW-CUT SWITCH should be "CUT" posi-
tion.
This
amplifier
is
characteristically
flat
even
in the low
fre-
quency range. Therefore, in TRANS OUTPUT, the acoustic
effect and frequency-response characteristics may be altered.
In TRANS OUTPUT, cut off unnecessary low frequency to ob-
tain the best acoustic condition.
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